83 lines
2.0 KiB
Go
83 lines
2.0 KiB
Go
package d2asset
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import (
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"errors"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2fileformats/d2dc6"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2enum"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2fileformats/d2dcc"
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d2iface "github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface"
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)
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var _ d2iface.Animation = &DC6Animation{} // Static check to confirm struct conforms to interface
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// DC6Animation is an animation made from a DC6 file
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type DC6Animation struct {
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animation
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dc6Path string
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dc6 *d2dc6.DC6
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palette d2iface.Palette
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renderer d2iface.Renderer
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}
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// SetDirection decodes and sets the direction
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func (a *DC6Animation) SetDirection(directionIndex int) error {
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const smallestInvalidDirectionIndex = 64
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if directionIndex >= smallestInvalidDirectionIndex {
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return errors.New("invalid direction index")
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}
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direction := d2dcc.Dir64ToDcc(directionIndex, len(a.directions))
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if !a.directions[direction].decoded {
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err := a.decodeDirection(direction)
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if err != nil {
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return err
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}
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}
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a.directionIndex = direction
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a.frameIndex = 0
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return nil
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}
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func (a *DC6Animation) decodeDirection(directionIndex int) error {
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dc6 := a.dc6
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startFrame := directionIndex * int(dc6.FramesPerDirection)
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for i := 0; i < int(dc6.FramesPerDirection); i++ {
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dc6Frame := dc6.Frames[startFrame+i]
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sfc, err := a.renderer.NewSurface(int(dc6Frame.Width), int(dc6Frame.Height),
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d2enum.FilterNearest)
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if err != nil {
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return err
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}
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indexData := dc6.DecodeFrame(startFrame + i)
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colorData := ImgIndexToRGBA(indexData, a.palette)
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if err := sfc.ReplacePixels(colorData); err != nil {
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return err
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}
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a.directions[directionIndex].decoded = true
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a.directions[directionIndex].frames = append(a.directions[directionIndex].frames, &animationFrame{
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width: int(dc6Frame.Width),
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height: int(dc6Frame.Height),
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offsetX: int(dc6Frame.OffsetX),
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offsetY: int(dc6Frame.OffsetY),
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image: sfc,
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})
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}
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return nil
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}
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// Clone creates a copy of the animation
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func (a *DC6Animation) Clone() d2iface.Animation {
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animation := *a
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return &animation
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}
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